Abstract
Unsteady convective flows in porous media are of considerable interest to the technical community due to their frequent occurrence in industrial, technological, and natural surroundings. The study of these flows caused by sudden changes in the wall temperature or surface heat flux open up a wide range of engineering applications in such areas as the cooling of electronic equipment, the cooling flow in the combustion chambers, and reactors. The main concern in such flows is the possibility that extreme conditions may arise during a start-up or some other transient. Heat transfer through rocks or soil, leakage from a vessel with porous insulation around it, containment leakage from buried drums, or containment leakage from storage underground cavities, and their consequent transport through geological strata, are other important classes of practical problems, where knowledge of the unsteady transport of a scalar quantity (mass of a pollutant) is of importance. This chapter reviews some external convective flow problems in porous media, which involve transient responses for bodies such as flat plates, circular cylinders, and spheres.
Published Version
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